Machine for mortising window-frames for sash-pulleys.



PATENTED APR. 23, 1907;

. T. A. mass. MACHINE FOR MORTISING WINDOW FRAMES FOR SAS'H PULLEYS.

I APPLICATION FILED MAY8.1906.

2 sums-451mm: 1.

HYVENTQR.

' WITNESSES.-

A TTORNEKS 110.851.2441. PATENTBD APR; 23, 1907.

T. A. MOSS. MACHINE FOR MORTISING WINDOW FRAMES FOR SASH PULLEYS.

APPLIOATION FILED MAY8.1906.

2 SHEETS-SHEET 2.

Q2 WITNESSES: N I INVENTOR.

' {Eh/7,7 #514 4 ATTORNEYS Y invention.

nnirnn entries PATENT @FFTCE.

MACHINE FOR MORTIISING WINDOW-FRAMES FOR SASH-PULLEYS.

Specification of Letters Patent.

Eatentecl April 23, 1907.

Application filed May 8, 1906. Serial No. 315,744.

To all wiwnt it nuty concern/.-

Be it known that I, TURNER AsI-IBY Moss, of the city of Baltimore and State of Maryland, have invented certain Improvements in Machines for Mortising VVindow-Frames for Sash-Pulleys, of which the following is a specification.

This invention relates to a gauging device, adapted for application to a mortising machine, whereby the shape and size of the mortise in the window frame is easily and readily controlled, as will hereinafter fully appear.

In the description of the said invention which follows, reference is made to the accompanying drawings forming a part hereof, and in which, I

Figures 1 and 2 are perspective views of sash pulleys for the reception of which the frames are mortised, and illustrating two styles of pulley. Fig. 3 is a plan view of such parts of the mortising machine as are intimately connected. with the gauging device forming the subject of the present Fig. 4 is an enlarged partly sectional view of certain parts of the machine, taken on the dotted line 9c:z:. Fig. 5 is a perspective view of the gauge employed in mortising for the reception of the sash pulley shown in Fig. 1, and Fig. 6 a similar view of the gauge used to prepare the window frame for the insertion therein of the pulley illustrated in Fig. 2;

The machine is represented in. Figs. 3 and 4 as provided with the gauge illustrated in Fig. 5.

Referring now to the drawings, 1 denotes the stationary stand of the machine, having the shelf a; and 2 a frame held to the shelfa by the bolt 1) which, in some circumstances, serves as a pivot in the change in position of the frame and thereby adapts the machine formortising for the reception of either one of the pulleys shown in Figs. 1 and 2, as hereinafter described.

8 is a shaft provided with a pulley 4 through which. it receives its rotary movement. The shaft 3 turns in bearing boxes 0 and (1. only one of which is shown in Fig. l, whileboth are illustrated in Fig. 3. These bearing boxes are practically a part of the bed f which is susceptible of a sliding movement between guides g forming parts of the stand. The means whereby shaft 3 together with the bed f are given a forward and backward motion are not shown as they,

- in common with the shaft and bed, are well known in machines of the class to which the present invention pertains.

5 is the boring bit whereby the mortise in the window frame is directly produced, and it is secured to the end of the shaft 3 by means of an ordinary chuck 6. The boring bit 5 extends through a depression it formed in the frame 2, and also through an opening "t in the horizontally sliding head J.

7 represents the part of the window frame to be mortised, and it is held against the face of the sliding head J in the frame 2 by means of the clamp 9 which, being a common device, needs no description herein.

The front face of the frame 2 is provided with angularly placed projections j which coact with similar projections 7c on the rear of the sliding head J to produce a dove-tailed connection well shown in Fig. 4.

10 is a vertical vibratory shaft extending through the head J carrying at its lower end, a segmental pinion 12 the teeth of which tened in any suitable manner to the frame 2. A handle 11 a portion only of which is shown in Fig. 3,.is secured to the upper end of the vertical shaft 10, whereby the sliding head J with the window frame 7 may be moved horizontally and independently of the frame 2 and the boring bit 5, in the operation of the machine.

In mortising a recess in the window frame suitable for the reception of the pulley shown in Fig. 1, the boring bit has first to cut a recess in the window frame having a depth and length corresponding with the thickness and length of the flange m of the sash pulley. It then has to cut entirely through the window frame for a distance equal to the length of the said body, when the mortise is complete. It is to effect this operation, and to allow of change in the length, angle and depth of cut necessary to adapt the machine for mortising for the reception of pulleys varying in size and shape of its component parts, that the gauge forming the subject of the present invention is employed, and which will now be described.

Referring now to Fig. 5 which illustrates the laterally moving member of the gauge adapted for use in connection with the pulley shown in Fig. 1 and which requires two screws for its attachment to the window frame, the flange in itself not providing any means for such attachment, it will be seen mesh with the teeth of a straight rack 13 fas- L8 D will be subsequentlydescribed.

that it consists of a vertical plate A which is fastened by screws n to the sliding head J, having the horizontally extending lugs B and C at its ends. extension B of the lug B, is placed a plate D having at one end a lip E which limits the movement of the said plate independently of the lug in one direction. The adjustment of the plate D in the opposite direction is limited by a tap screw 0 which passes through a slot F in the plate D and is screwed into the extension of the lug. By the construction described, adjustment of the plate D longitudinally with respect to the-lug B, may be easily made by first slacking the tap screw 0. The reason for this adjustability of the plate The lug C is similar to the lug B except that it is longer and on a lower plane in order that the plate D which is seated adjustably thereon, may be in horizontal alignment with the lug B. The means for securing the plate D to the lug C consists as in the case of the plate D, of a tap screw p which passes through a slot in the plate D and is screwed into the lug C. G is another slotted plate seated on an extension D and attached thereto by means of a tap screw g and is therefore adjustable in position with respect to the plate D and also with the plate D with which it is in horizontal alignment.

H is the longitudinally-moving element of the gauge. It is formed of a flat plate equal in thickness to the two plates D and G, which is held on the uppersurface of a lug I forming a part of the sliding bed f before referred to,- and it is adjustable in a line which is at a right angle with respect to the surface of the plate A, by means of a tap screw 1 which as in the case of the other adjustable plates, passes through a slot and is screwed into the part f beneath. The plate H is on the same plane as the lug B and the plates D, D and G, and in the movement of the boring bit towards the sash frame the plate H is carried forward so as to bring its end in contact with the edges 8 of the lug B or the plate D while its lateral edges will serve as a stop to limit the horizontal movement of the other element of the gauge by coming in contact with the inner edge of the plate D or the corresponding edge of the plate G.

To prepare the machine for use, the part of the window frame to be mortised is first clamped in its proper place. The longitudinally-moving member H of the gauge is then adjusted so that its end will strike the front edge 8, of the lug B or the corresponding edge 8, of the plate D the two being in alignment, when the boring bit is in such position as to bore to a depth equal to the thickness of the flange 'm of the pulley. The plate D is then set with respect to the lug B so that the projection of the edge of the said lug beyond the On the upper surface of an' edge of the plate D will correspond with the overhang of the flange m, or in other words,

the distance from the extreme end of the flange to the near side of the body of the pulley. The distance between the opposing edges of the lug B and the plate made to agree with the length of the body of the pulley, after which the plate G is set so that its inner edge will have a distance from the plate D equal to the extreme length of the pulley, or from one end of the flange m to the other. The machine being now in a condition for work and set in motion, the head J is moved over by means of the segmental pinion 12 and the rack 13 through the rne dium of the handle 11, carrying with it the window frame and the laterallymoving member of the gauge having a motion in common with it, until the whole is stopped by the plate D coming in contact with the side of the longitudinally-moving element of the gauge, viz., the plate H when the boring bit which moves with the plate H penetrates the window frame to the proper depth. The direction of motion of the head, the laterally-moving member of the gauge, and the windowframe is then reversed, when a rabbet is cut in the window frame for the reception of the flange of the pulley. The bit is then allowed to pass entirely through the window frame, and in the movement of the laterallymoving member of the gauge, cuts the cavity in which the body of the pulley is to rest, its length being governed by the distance between the inner edges of the lug B and the plate D they serving as stops to further movement. The bit is then withdrawn. From the foregoing it will be seen that by the adjustment of the various parts of the gauge, cavities may be mortised to suit pulleys with flanges of any thickness and length, and bodies of any length, provision being made for inequality in the overhang of the flanges beyond the body at the two sides thereof.

hen a mortise has to be out to suit the sash pulley shown in Fig. 2, which it will be observed, is to be held in place in the window frame by a single screw at one end of the device, the other end being at an obtuse angle with the surface of the flange, the frame 2 with its head J is swung around to the proper angle and the laterally-moving member of the gauge shown in Fig. 6 substituted for the one before described. This device differs from the first one, onlyin that the innerfaces of the lug B and plates D and G are not at a right angle with the face of the vertical plate A but instead have an angle corresponding with that indicated at y in Fig. 2; and that end of the plate H is shaped to suit the surface with which it comes in contact. The mortising operation above described is then performed, which effects an undercut at one end of the rabbet of like shape to the inclined end of the flange of the pulley.

D 1s then I claim as myinvention In a mortising machine, a laterally moving clamp to hold in position the article to be mortised, and a longitudinally moving boring bit with means to move it toward and from the said clamp, combined With a gauge which consists of a member comprising a vertical plate attached to the clamp, having a lug at each end thereof which extends in a horizontal direction, each lug being provided with a plate adjnstably connected thereto the said plates being in alignment; and a longitudinally moving member having a motion in common With the boring bit and situated on the same horizontal plane as the two plates, aforesaid, and adapted to come in contact in the operation of the machine, with the inner end of either of the said plates, substantially as specified.

TURNER ASHBY MOSS.

Witnesses:

THoMAs G. HULL, WM. T. HOWARD. 

